{
  "manageEntity": {
    "action": "Save",
    "entityId": "319551459",
    "entityType": "Track",
    "nonce": "0xd5f1645310e124787a777f1a756c4e0093a332e6d10817cdd62cdd2cf4a86958",
    "signature": "0x0dc36e02ba42d33936afade30902506f189cd8437101cdd3a68b6a3ab69077a13bc278e781fdc1ee1bc156e66fbe4f659aa4aa42fbd315fdd450ce20fbfc368e1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}