{
  "manageEntity": {
    "action": "Save",
    "entityId": "1087018412",
    "entityType": "Track",
    "nonce": "0xcc70bde76de202439500df3d67c72cd6ece41ec56a78c3dfbefffe1065e35e1a",
    "signature": "0xe1dc95c15b9f8926c4864e7702b299a2c32f0b2027ef263f5e7b47ce7cd6c25d4b661abc735a29bcce7f12e8cc50f948e6d3540bbb058be939a4af53c126818b1b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}