{
  "manageEntity": {
    "action": "Save",
    "entityId": "1071149188",
    "entityType": "Track",
    "nonce": "0x7a2b5b6984e308ad693abc46a3080a2e2550405712b5505e1774a8e48a37812c",
    "signature": "0xca6ee0ba86122af02a3f4725afe9e85663186995553f9c5dafe0aedcb48bde5a15a8243c9de4132a271e50e088eb6983ff35df6f15184bbc359341523c9daa781b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}