{
  "manageEntity": {
    "action": "Save",
    "entityId": "1386859076",
    "entityType": "Track",
    "nonce": "0x12af2b9059fc8eef7ad2b5fbf218776decf25b81efe4dd08b8a0e0ec00c30b72",
    "signature": "0xc888de229f81f4fdda685857b48fb1581b9273f831934fe49e147b72c8645b242fc3db683f504a11212a85456015d25028c5f9b057c89b04c8439072bc51cdc71b",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}