{
  "manageEntity": {
    "action": "Save",
    "entityId": "1100535",
    "entityType": "Track",
    "nonce": "0x09028b5494fee382d49524ec741248240057690e66fd17fc28ab4318bc80d0b0",
    "signature": "0x2ddbb52032d1e156b1fa2a1b0da39257db6006b0c3d68890a12e4bc7e6d2f1e371bd3161c33be57d85d4b1062573fe36c02aae1947a0fb67b715845c9cd10c211b",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}