{
  "manageEntity": {
    "action": "Save",
    "entityId": "1252083684",
    "entityType": "Track",
    "nonce": "0x0b270693605989b2a90971ef02aedceb2e0e8a7283251f23a1d05538085b0917",
    "signature": "0x2c418af32bf4bc4aee1f2a20e4f48f9a011cbf544e97de9a2c325bf5faea06194a4fb071999f50281f5c28ac1e92e52ada42e8e7556a4a927b744c5eb4e0a8381c",
    "signer": "0x3D472a01Cb831ac594835ac6038A4346E2A22B94",
    "userId": "327343"
  }
}