{
  "manageEntity": {
    "action": "Save",
    "entityId": "22860",
    "entityType": "Track",
    "nonce": "0x8d2d46e8498d77c3cb2b28aa9a36f3136c0cf46e1d4ae850ea41b9b9c2a521d5",
    "signature": "0xa5c63d552d8378149ace220dc2ba5fa1675a1b68027bd2606962d3d1717f701e2895f0e9e8ec2faf274a7a1fd850cfd94860d6b8afa30c2c1244760811baabc81c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}