{
  "manageEntity": {
    "action": "Save",
    "entityId": "1373014801",
    "entityType": "Track",
    "nonce": "0xa3aa24cfe3065e2bdf0eea8badd14c3aff567f2c399af08a2e14083ee438e784",
    "signature": "0xacc5f0ad61683414ec2cef79de3e77725985d4f399ca9d634a7dde9412f594375b26c4b1c72b2615bdddb88acc220803482ae3d5e6b28e17ad3ece946f2597271b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}