{
  "manageEntity": {
    "action": "Save",
    "entityId": "1409069852",
    "entityType": "Track",
    "nonce": "0xaa8a162cd32825383e65f936164e405b754197566ccd9f69ec89a5f652da153d",
    "signature": "0xfbe2c18cad42af034ee0310ed16c6c1c850ec2dfe1b7bef9a2b635209678bda32e6b91b83739080dbf294752eb55a5d1f0889cf741d8aa55ff2217a6f825f4c21b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}