{
  "manageEntity": {
    "action": "Save",
    "entityId": "226876",
    "entityType": "Track",
    "nonce": "0x2a5ff973bf222b3d1493c163fb01675d7dfa6f15352a78a9efa86eee1a243082",
    "signature": "0x37c134714424ec3ce0f611139777bc4ef5bcef02bb1e403cbe55418add46c5c4071ba937500fca0088e517ca1349e70a711bb2c6d5c77badde4808760ba47df71b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}