{
  "manageEntity": {
    "action": "Save",
    "entityId": "1963132187",
    "entityType": "Track",
    "nonce": "0x73f5555748c97341852f3a63abeb8f55c3bd4209fec33a11ca4b1d98f283ab69",
    "signature": "0x4f45f481eac102afbe71d04b60d942f858bd90fdd8cda369a39c69728d917ec3535012a2c4a31c3935a59a81e61c162ef14ff6abddb2f15b7252dc130edcc1471b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}