{
  "manageEntity": {
    "action": "Save",
    "entityId": "767334803",
    "entityType": "Track",
    "nonce": "0xc3b17981ef76281ea71e683596ca20edb5f6be787e73de1089744a63e6078326",
    "signature": "0xdcd69784ec8a55d24ba7f74bf061d0f7d2d4bf542c1d47e37429b6fbc5ce52cd067045e0d40e582793db7fda0e39024b284affd297389f1ff32ed14827f45d8a1c",
    "signer": "0x90CBf7c9BBF688fd9Fa4029B96e1BC32b270cA24",
    "userId": "711459379"
  }
}