{
  "manageEntity": {
    "action": "Save",
    "entityId": "1815620013",
    "entityType": "Track",
    "nonce": "0x4c7c52f593103bbf626824d736024796a637b3030525bc74ae74dc7ca8c3b380",
    "signature": "0x1ac76ed7f2a07ac9ffa0996ef7fdc1e2aa15d816c3d281e2206b1e17c87b7aad089fe6920fdc6b8fa2d6f4d9425f1fcb65ade3c68041c34ba8db677d13c127bf1c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}