{
  "manageEntity": {
    "action": "Save",
    "entityId": "403875063",
    "entityType": "Track",
    "nonce": "0x24ce8f32f45b39bed3d04e2d7c97acfd9fffc84d147b39455a1187efc3808976",
    "signature": "0xb8fb355860cd2bedbc431f55d88f7a96884c513c40646aff39ce4b94fc2a04d04cbd3841a407676cbd808f73afd95b9f380be7d364e0ae23603e97a7978389e71c",
    "signer": "0x34Cea527C1dc0575a5B686515aad0Bf8F3b5f97E",
    "userId": "13589021"
  }
}