{
  "manageEntity": {
    "action": "Save",
    "entityId": "1043611485",
    "entityType": "Track",
    "nonce": "0xfa878bab66ced1a42c3e5daa9bd09ff001e01abe5d5c1b8b9018761084b71f76",
    "signature": "0x6b8a4831a98b5e1eb5557a39e8c0999ce7ae7bc6636a14716220704eb29efcc01d82e7dc9dbe7e1c9481ad73aa60bf1e73211f4e3050242eb344d7374ca9dd5c1b",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}