{
  "manageEntity": {
    "action": "Save",
    "entityId": "2081648300",
    "entityType": "Track",
    "nonce": "0x8fb09c2ad2c45fbd3ddfbd49ba4fcee4f2437746032951b7b1993ec4a07b0ea8",
    "signature": "0x7e818b8492ce7b3057db9f476d380e37c88c06ef3d2ca8c06a0001dda82b2ee6634c8bf00b8b77c21db37d4a61ceb200543743c2a273b070c08306ec435e247b1c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}