{
  "manageEntity": {
    "action": "Save",
    "entityId": "1591743766",
    "entityType": "Track",
    "nonce": "0xa11898360223c0bbd639670006de3aee072197dffc0ada4f2a2a991a2201a66f",
    "signature": "0xc92c0701252170ed71519bd6c010a66769b5fb84147c27a8f921766f0cdcfb746efbb56c66633033c3eb473455d5bd059428b3b5a12a6f885ce84c2d4739025e1c",
    "signer": "0x9765cbE8e26a2c6c4847C1B69ABeB0B5250EC254",
    "userId": "678556080"
  }
}