{
  "manageEntity": {
    "action": "Save",
    "entityId": "1494339731",
    "entityType": "Track",
    "nonce": "0x01674d1e26e1b963efbc436a47fb62923198e6e642cec3f5c3d809a77e0bb2dd",
    "signature": "0x4d1baa0e3355ca95e61b4697baef37f4daf710763358e86ccc4cf45b33630a3a7c6b6d7e3121815bd23e2a871df068a695d94768cae1e565f4275f40bea702471c",
    "signer": "0xB2A34b43465721B690e6CbCfB42C0cdC30050183",
    "userId": "103086"
  }
}