{
  "manageEntity": {
    "action": "Save",
    "entityId": "1061100",
    "entityType": "Track",
    "nonce": "0xe50a0e9e7909737dd1398b2aa690db14607fa25d44e1712a2d8860a83ea0a31e",
    "signature": "0x7b7df927490457b82fd3f72025937e5b0f450eaf9bc1900ee8c598ea00c318e55d58d9d68cd4bae2359ae9a3d88077f23738ccc3ed8b797e83403d9912a9dcb11c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}