{
  "manageEntity": {
    "action": "Save",
    "entityId": "1770192244",
    "entityType": "Track",
    "nonce": "0x9095d9d0b798d2e643d718ed99a42d490eeebb08b2d85abe893e58a6b31dabb3",
    "signature": "0xa90202bcd56271c77392eb41982aee03588d7290b401fc13382e84eda8569de73dac84773f080943a68748c560e0e187a10fcbb628e46f5d65c6a565c8764ea01c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}