{
  "manageEntity": {
    "action": "Save",
    "entityId": "522792",
    "entityType": "Track",
    "nonce": "0xf82c449259d06a64b50c0e2effd35e1b3d7fa9948a50a1e6f7a0676276f52c7f",
    "signature": "0x5e229bcdbbb65cfe7edc352f203e121cd5eeee43c1d7f90284fdfa825017b54773aae1ca7dabe4859925a9a0b0117e06deb4b9caa50193e1b99ce5751027190b1c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}