{
  "manageEntity": {
    "action": "Save",
    "entityId": "17624471",
    "entityType": "Track",
    "nonce": "0x2c3eb28a8f520f79de6a7afed71afe4117578ea9bc1a2cc59b4534267c58586f",
    "signature": "0xd8ec320579c8f29611e1daf2c1239d46d03c65e27ac77ac97a327f088c2f926705ebcb82fb2416fbdc0f4eaff955bdb5f9cde1980c2d57bb15e7a3c4afdf93171b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}