{
  "manageEntity": {
    "action": "Save",
    "entityId": "1755767384",
    "entityType": "Track",
    "nonce": "0xa4a80c8d77a8c844bbcdd0b2178299c0dd143149c549b9582ad7b769c331490c",
    "signature": "0xb4e0ab4f6a349cfd3e23a22b1788868a679dea1674f4a3a6181502d7bebe95145493d5e2ffb0fe1ebeb0d1367d470473c3dc1e8a6f5bba7a0da22314b6cffddb1b",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}