{
  "manageEntity": {
    "action": "Save",
    "entityId": "1124661583",
    "entityType": "Track",
    "nonce": "0xbc1ec1ac3c73dd8c7f021c0ab1aee87196525f2fc05337b00544067fcb21d2bb",
    "signature": "0x2295e7526bce828265533aa808cdca64dd786893e6bb4b370a9dbd3ed6bff38a630ff9d12ce187a3a54382d1e77c4fc1cd956ba50dbc8dc9a93aff7bf9def32b1c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}