{
  "manageEntity": {
    "action": "Save",
    "entityId": "399062518",
    "entityType": "Track",
    "nonce": "0x682ae3c8d2d4cf6e049c6ed32acf9413be85b6ba3bb086fdba1421c7182abcbf",
    "signature": "0x74312897105016464139013a8001b77c6488ba9ceddb9e15f70b52eb34dc372f3f9395c06a0385b09539c3d2433dd519aea7359b23d26fbc8ef46223ecb569d61b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}