{
  "manageEntity": {
    "action": "Save",
    "entityId": "1185140198",
    "entityType": "Track",
    "nonce": "0x61e0887857b1be29914138329ab940e68044ae1bbbe11825e38554bee23334cc",
    "signature": "0xb0dee7fb5d190988797d915e80fae2f109d82e222edfc2f0df4e4918278a199f000d5bc6feb8839be9fcc441f4348fc625c1b792041655d8a104055495837b421c",
    "signer": "0xcdc1772589e70ee6667FAaC93E3F0CcD5BFDa2aE",
    "userId": "354908"
  }
}