{
  "manageEntity": {
    "action": "Save",
    "entityId": "1675266630",
    "entityType": "Track",
    "nonce": "0x3216afca56c9c5f2a482d2e64381c443e784d595820f7da280f898e85aa72a62",
    "signature": "0xaec0790d977a0f9504359ca4002bfc1efd205d836e2e606d6f4445f7c9b3c4f9157608c5ab12a50b29cacc08e685c59b5a8048ee50a7a35ccf543fd96bc719d41c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}