{
  "manageEntity": {
    "action": "Save",
    "entityId": "1425184925",
    "entityType": "Track",
    "nonce": "0x3607e1643f369978fcb1ee45e05d3769a7a59950e9669dcb7d9d2c7ada18a70a",
    "signature": "0xb6ea040499bffdf36f20b0b486ee606dc373ae42cde4ac28f8d7358bead1fdc674d2aba19074dad230287946e2478a2f7e5dfe8945e802ab814ea0579aaa8f1d1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}