{
  "manageEntity": {
    "action": "Save",
    "entityId": "169318",
    "entityType": "Track",
    "nonce": "0x08ffda9ef5ee913bb42498298ff960b2ad6bcc0297853e724aa4329b9dc0f0e2",
    "signature": "0xe6f3c95ee14b417f0e81a5d25ad0cadc0ab944a2bf135d6dab49a5e6c9589f586f2ca4fb429b058373106d6fecf3ccbbb5352156d436e9dbbb0046fd12db7dd41b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}