{
  "manageEntity": {
    "action": "Save",
    "entityId": "376952",
    "entityType": "Track",
    "nonce": "0x338df6b1ea67af95945ea3445a81793e439b0d94f09c6279d1d89bbd96bce878",
    "signature": "0x26575f456e882cd05d0f5693efc81517b5225751177783b82ab4bb88b585edc340ad4866a1832c40179afcf56ee4a14b98913824367dfb4e9d5632dff6379dba1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}