{
  "manageEntity": {
    "action": "Save",
    "entityId": "1473381650",
    "entityType": "Track",
    "nonce": "0x39a0df2873f3de347b6809abb7b298e3eff24089d5bd0f8239ec2ee0f59b5039",
    "signature": "0xd62d9a29f6e115a07eb6ed7ce5f6fce82daecf3a1074cd4f6abac139eb024a9909c52c08cbc62cf7aae2b34191d7f8a773406ec3468b9bbd1c4475709f01a3661c",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}