{
  "manageEntity": {
    "action": "Save",
    "entityId": "545460647",
    "entityType": "Track",
    "nonce": "0x3b3fc9a44520ca676912e5c119c7f570bfb224cbc64a1e353946ee782252710d",
    "signature": "0x2bf917bffcc1e18d56962ef82a3148e98650be7dfd1753dcd75d7948a7c8184078dd8d9ff3ab99ffd8c09ff7e127d34562826f98e18c3bacc0689391709bd96a1c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}