{
  "manageEntity": {
    "action": "Save",
    "entityId": "1833418683",
    "entityType": "Track",
    "nonce": "0xeb4a8174af15666c22899d18ed6a5163b7171b3a13600627c084db93940205c0",
    "signature": "0x0a7e524a4d70136bc0fb996f5b0d3a4c58d6d3ad9901d0d83eb7b731ddd45ba6214d1842a811fc2f96eb1a1969ef68a5a0f93d3f69c10fd72effcc560fa8eba71c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}