{
  "manageEntity": {
    "action": "Save",
    "entityId": "881974540",
    "entityType": "Track",
    "nonce": "0x88122c6b851d0df7032afc78e17727048b7d69ba6981fe7b37468359859a05aa",
    "signature": "0x9604fda2de4a8318ece77ae4b0458402456fbd7183f8ffcb060b63876f1a230a33046532e249c7a7fa03de0d4891d110421650399591c3105a440ddb3d6d74851c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}