{
  "manageEntity": {
    "action": "Save",
    "entityId": "923314354",
    "entityType": "Track",
    "nonce": "0x5c7553ed1de873fe22b59c1679e54aeb2f0a4444d98dbbef5f5fd94bb0f4a573",
    "signature": "0xa77058f0ef99ec2184f6feebd578f5dc81aea46d060dfe669ee6b72a009ae261555901b1ce44b9b803ac0bd6fa17cd79a29094b5570947b2c7edb1a5a541daac1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}