{
  "manageEntity": {
    "action": "Save",
    "entityId": "1876402020",
    "entityType": "Track",
    "nonce": "0xd04cb252693096c4bc9e593202c2074423ea2e327711f6f61eb444975993282d",
    "signature": "0xf834a3a09c5d71ef8b7c278596ad1dc1fb2f3d9760fc7661bf87ce8f08aa95da24e27637e89c85323b868a1cd202c20ec485fbe63b681251ee520a6f4635f9871c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}