{
  "manageEntity": {
    "action": "Save",
    "entityId": "814026322",
    "entityType": "Track",
    "nonce": "0x90ab15a589c82ebbcd7846b3a60852fd24d24242bd67b1d1345def45eb8be0aa",
    "signature": "0xca109239714d65e210b2a39a39c3709a1c020d24ba9cff6451079d6176438f99729ff2686153bfe92e45980c12c61c0b9726d39a4924b41e69d8a54048a7a9af1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}