{
  "manageEntity": {
    "action": "Save",
    "entityId": "620869114",
    "entityType": "Track",
    "nonce": "0x066f89c25577e1998b0c360ffe16e7db4a1ea27da9767137e01de6e969808481",
    "signature": "0xeb40aacb64f8cd6495f60db6ddbe4bd805e61a420afe5648edd5c1547e92242d3ee2e7f0ec9650759af198f352cea52b854ed96541d9e4a2dc9c35eae5dc391b1b",
    "signer": "0x4Aa8154A33F33394BA8De574d71aC98Ba6A47D5a",
    "userId": "645720561"
  }
}