{
  "manageEntity": {
    "action": "Save",
    "entityId": "1898776004",
    "entityType": "Track",
    "nonce": "0xe5730ecd31ed6cae29c1c3960b6cd0a7ae5c60f295dfc6c5c9f68f2f5576daf2",
    "signature": "0xb1dc324009cd767d1ebe1f890c9e1686fe09b500f726c7f66503fe5fe2d240c6010a67068b820a9464321e458cc282c434ddc080bb892716a6d68ea041cc00bb1b",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}