{
  "manageEntity": {
    "action": "Save",
    "entityId": "1367037905",
    "entityType": "Track",
    "nonce": "0x64996f6506270082403c96415c7c92892938f5936698c875a1ea8b7be62d9015",
    "signature": "0x50614a40a1d38ff20dc4f2f1f30c5972e67fb72580ce4790a98c3d7eaf08bc015d751cc47e269abfb71080a6a6620ae67d355c4950c8db89412481233f4770ec1b",
    "signer": "0xb6B208a8f79b1D88d245afa5aDB0a40d38cd6DD1",
    "userId": "528688046"
  }
}