{
  "manageEntity": {
    "action": "Save",
    "entityId": "55775463",
    "entityType": "Track",
    "nonce": "0xdbda378d1bc2b9b53d574e16e65edb7681920b6a900fc8213b58900028b0b05a",
    "signature": "0x805ff04b00e4a259832238f65cba7ed77e0819eb61f2588fabdb163f6bfad9a61a1b1d6a3ee3639984cfb720b1aa3d13ac7797f4377d4b180e99456363d170c11b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}