{
  "manageEntity": {
    "action": "Save",
    "entityId": "78145893",
    "entityType": "Track",
    "nonce": "0xd10bffef84d38713b4d386191ae2068fec0ea57e72ce6742ebf361b5fc397c0c",
    "signature": "0x4e4e0f8480b59c67d8dcb71b4892987b20ea369e0680d5c41f0c360ecee2ef3c0257b9f2568e8892d1b8fcdf06864655e03d841eb087769e63a61a1a29456dee1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}