{
  "manageEntity": {
    "action": "Save",
    "entityId": "1223840046",
    "entityType": "Track",
    "nonce": "0xfb1b9b37df868492bf1f5c2fd1f2e57b2c4e24c0bae1066026ea795f5ac4e53a",
    "signature": "0xe913340ba3a09dd2295f2e1ad82be12fdab25a8b75d8adb64fcab9ef58cd0be96fd8f151a97fce305c96069bbf64d5f2f341414c0df48fc34271e1750613a1ee1b",
    "signer": "0x0b901AE3Eb7b439095858D82Ff194CfeD0Fd3396",
    "userId": "167557"
  }
}