{
  "manageEntity": {
    "action": "Save",
    "entityId": "189618897",
    "entityType": "Track",
    "nonce": "0xc759ffc89ee98b8e0c2a3320f3d0cac0a830475a696afb537c7073331396422a",
    "signature": "0x7b47e9f1cec585221c6e8e74bd8a6207d5bbbe0e48287fa094742c0496287d54471a2c41f28a1803395b584e7f3ca91a2ea9c210559a244baebce4e96867c6c71c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}