{
  "manageEntity": {
    "action": "Save",
    "entityId": "1754085893",
    "entityType": "Track",
    "nonce": "0x78bad13953f09b8627e957ef6b5e12dab10395221334167aaa7bacf1214db792",
    "signature": "0x6d3761f0dcaa875f94efd98a3b48fd78086459a4a7018c0ca19b3ba62140c4841f0583539ff80c69e081105a40e848b91e3b5dca0c2ae2e05ba6e106013e31571c",
    "signer": "0x2B171214e998033E806F72301307B2160CD94DdB",
    "userId": "489165782"
  }
}