{
  "manageEntity": {
    "action": "Save",
    "entityId": "981816004",
    "entityType": "Track",
    "nonce": "0x5e20d4d86a920da87690161735cf819e6f8d6549d2717f15e46945c3da322ab0",
    "signature": "0x62c86fdab5e4932982d1c74852ab8fed51e27884ec1349966f6721404118aa3327b7df8500e0ff4190ea15d3c02bf197cbda04eba23e31cba7428a0bab6f4e151b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}