{
  "manageEntity": {
    "action": "Save",
    "entityId": "108911",
    "entityType": "Track",
    "nonce": "0xe76f4cbb52fff636721a178e90bb124b8e090430ed6b64b2819381d5fbafa949",
    "signature": "0x66eeb7a5feac512598824dc5188ba18d2fcb24438dc64ae653003a39f52c85b2127e8874d65337b05a272e7b680ea7109cd8806dc493e5dd6b86c2fdb7a63ab81b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}