{
  "manageEntity": {
    "action": "Save",
    "entityId": "706217683",
    "entityType": "Track",
    "nonce": "0xbc02fb21d62876942f3b36a7444a41d4f051c82e6d6c69e37c98dc6e8d9a891e",
    "signature": "0xf35c19ba54d95acbfb5e42554e976fd2d05fbd147e0eefd588ed44b3d58c712b7e0cf37d760a2f7d4f9bf1aaeb18956627836cdef9ee92fcc31c992789f4c4171c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}