{
  "manageEntity": {
    "action": "Save",
    "entityId": "2013325923",
    "entityType": "Track",
    "nonce": "0x2555877e5250c41a019cfbc40a39cc89ada4caa81e58e71c22c14a4b202b9455",
    "signature": "0x68633e1625e10b7a2ee90cf80a8520111b2747c8b206b8010fa947a0d54600c61894d19ac849c0bcd2798592e380e7ed374c7341bf581fb75ab0f7ac4e07d4331b",
    "signer": "0xa185Ff45de6FF68eAa1d7ceC338cba250810134c",
    "userId": "54166466"
  }
}