{
  "manageEntity": {
    "action": "Save",
    "entityId": "2089589162",
    "entityType": "Track",
    "nonce": "0xcc8b806f8739daab235f16b85c8b3c170a677670c073302c5b0f761eedb55cb2",
    "signature": "0x74b31bbfa9cda20e65f8409cdc6df9ea570bbfc765eb83e6db93ad69c47480ff26908c35bbafde3b3630397f830526033d20d9ff0cfd1c3cd48749fff1c5c7811c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}