{
  "manageEntity": {
    "action": "Save",
    "entityId": "1892043313",
    "entityType": "Track",
    "nonce": "0x239fb73423ef9149466b050c97c6b6daab08b932f4f0d297e891ef8aead81abf",
    "signature": "0x37cac55c645aa43025b4691740cb0bf1a8570c6f0e0a45f7e10b98a67e91c21757e5e669c580109b85b361f75d2f15009efc28a7631ba5eaeb7342898715f64f1c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}