{
  "manageEntity": {
    "action": "Save",
    "entityId": "586573438",
    "entityType": "Track",
    "nonce": "0x95fdd4406b976cd9f540fb238231b7713298c0c9e3602e8602dfa7367beeaff5",
    "signature": "0x9e0c4459217edb6fc17eec0c2f3429e60ab241ecb6b05b1342570505c34b974501ad97645aa122719a6f6e87269c1ba630cfd019ef511a1781b7dac53fdfc80e1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}