{
  "manageEntity": {
    "action": "Save",
    "entityId": "697099016",
    "entityType": "Track",
    "nonce": "0x7ae42d1a2f4efe469e36ecb264fc899bfe48bbe043bfd66e7c9af9f45fd70dfd",
    "signature": "0xaf0c694dca4e9aec85d132ba80ed5afd660dc0c8aaec17de7195bdc5dc503da80338f9e68276ceabc5768fcc2bb24a49099674d7fefd3e2ec006622b5b76ba9c1b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}