{
  "manageEntity": {
    "action": "Save",
    "entityId": "1710662499",
    "entityType": "Track",
    "nonce": "0x11b43f4eb6d2b98dbeba973cfadca6fb894e65c6c024bcb3cbe07982622e45b4",
    "signature": "0xd40afaeeea191a33fda474e03500bc9dea7501c86cda4d1c744daeb2d4a8579061ac58408b435c36bda2b43aa12e81f3cd055f0d279def7086b096459f684eaf1c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}