{
  "manageEntity": {
    "action": "Save",
    "entityId": "1415214523",
    "entityType": "Track",
    "nonce": "0x0c6f865ae8f2e60bbf0aef28a7f95452ed2838856d4c0c65e237c50b92c87a87",
    "signature": "0x0614dc476a20e3850abb907c799998731b5f69e304b77a856912977828183ad9187899375361893386837b0f41b5fe8b705985aba7e30ad5884d2cab41ff01201b",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}