{
  "manageEntity": {
    "action": "Save",
    "entityId": "2119212222",
    "entityType": "Track",
    "nonce": "0xa35d42cde458fe0f11a9679bed7170616585b8b53a3f3fb4409eddc2b3d6db84",
    "signature": "0xd614c5803a7a8e94b7e3ae1a0d9283ddd2f4dac2b81b46c12dd75e47accb69134083fd22a94bcd62c854be3ac9efbe03117b8f011fcae7c44c709586b5ce50f61c",
    "signer": "0x86921d4751a5747c0793057F4d32DC03Fb961790",
    "userId": "785188686"
  }
}