{
  "manageEntity": {
    "action": "Save",
    "entityId": "1016289549",
    "entityType": "Track",
    "nonce": "0xf2d9784da709dbaa0e40abfec84ffd01bfe56238c5954b3241e922ca602b4ba9",
    "signature": "0x670b90b033e7156c1489e5946990a20f5927bc4a15440e1545268676b0b5b334700343a76514a5080e19b7b07a38deb241764f9ecce087fdd170bad5b15fd3771b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}