{
  "manageEntity": {
    "action": "Save",
    "entityId": "1895804411",
    "entityType": "Track",
    "nonce": "0xd689f029f62778a980541c09847ae8958d0ec9fc4fc15c1ab8f07cb41b6f1125",
    "signature": "0x0e840ad586ba460d2fb1809edde23efc0a41100398466cfa35a7dbf70a9eacef4789ff1342fd91996b8777c0ffbdebd8146fa9b89c9534d81764bcbacc0f821b1b",
    "signer": "0xc03cf24b1C519dA6a18B6509c7F5C57d01620755",
    "userId": "870665506"
  }
}