{
  "manageEntity": {
    "action": "Save",
    "entityId": "1813746503",
    "entityType": "Track",
    "nonce": "0x93c0b2b00ac6b01ad75be7f3c7f3f03802574f0b93bbf7414733f8231e5230f9",
    "signature": "0xf81c6ea3930a19e580b91638e53aa0280f87a7aa0f3b04f053abf005b7e0135e14c79cddfc23d9e17dc43576b19dd35f78618bbe110e6c3c2b0d5867fdebca1e1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}