{
  "manageEntity": {
    "action": "Save",
    "entityId": "162823896",
    "entityType": "Track",
    "nonce": "0x540716fc2a37b028395a341e49f00ad4680782cf6009c8b32c1fc9ffe9b88f04",
    "signature": "0x4535151e7e5ee2618e1289ae2e24e4ff2469298080c5ae9bd606e4ee0a206cc071cab4b0791ca650d912950de75e0e8c2c9cd4fc46fcfda3dd0750b7f651646a1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}