{
  "manageEntity": {
    "action": "Save",
    "entityId": "1586753185",
    "entityType": "Track",
    "nonce": "0x5f748d70afa9c543513d0266ced9e4bb090c11ac9feae113a8aec78b761a5e58",
    "signature": "0x0de7a5b6c5e472dda95f1eda1b0932520a1c257d4fd0295d603fa5157b2e3a0e01f2bfb5a054ca39b39dce8c744288a5c283883861c8e853b4a6e5dee89312b91b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}