{
  "manageEntity": {
    "action": "Save",
    "entityId": "1817056572",
    "entityType": "Track",
    "nonce": "0x8f3fb5e176877a3acfbb7f90883503ce6977f72ea78a451d536cc5fde749f873",
    "signature": "0x164bfd2f2d32f2e2dba23375ce8135efb5dc435534ec7237d614d530da8a22a46a970ac2598ed37e0b52456c2d2f5ea8a722aabe45207bfacc962111728415c31c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}