{
  "manageEntity": {
    "action": "Save",
    "entityId": "272837997",
    "entityType": "Track",
    "nonce": "0xfe288e472a32785f7b90bfe366c607ff2d5dd4421cdf0149915a71a7f97fea5c",
    "signature": "0x5496ec2971e7609428d63754866f7d48999e83e44364482b500da2c8dc92a8616909321e01943e8e7953d421df0353dcf6764631e3c1eaad63843f2c7223fdb01b",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}