{
  "manageEntity": {
    "action": "Save",
    "entityId": "1779273782",
    "entityType": "Track",
    "nonce": "0xa8b7d01274adeab4a9789762de26aa21f6552e74062fea9a6fda3646824e370d",
    "signature": "0x8483f6673a65195b656ba498c1db090d5d62ea4eb3775fc0b6f7ce8925cda48157d0edd54c134d1a19b781957068892e96f1327ff4d6a1de01b83db29bac74911c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}