{
  "manageEntity": {
    "action": "Save",
    "entityId": "1478351660",
    "entityType": "Track",
    "nonce": "0xa24d3eb8462aab39d493254e4fde58a6e53516d235a9d188c262928ff079c94d",
    "signature": "0xc18e273e5207362ace73c77f6e7b4c101413671389835618277f7798ac15ff3f7b63c86a5bdbc8181ff3965bb5d06fc73fc2559227343a17a73693e9fe4ff3ee1c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}