{
  "manageEntity": {
    "action": "Save",
    "entityId": "532966",
    "entityType": "Track",
    "nonce": "0x7b0216c577a6b922a949eecb7271d0ed588358d2aa6bc0710b295f6e47240406",
    "signature": "0xa2ce4e78142fb156ce8e2dafb23bb77010c915f027794040627a2222079e7d2525f2984f2ab3e32d5f879fe2d744418a1b139112f86fd927fc672cdcf819b1601c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}